getting UniswapV2: LOCKED error

[Samboy76]

Hi Uniswap team,

I've encountered an issue when trying to integrate with Uniswap, didn't find anything on google which is similar.

I'm using Hardhat deployment (forking mainnet)
MS Visual Studio IDE

I´ve taken out a flashloan for USDC token0 amount from uniswap_router, let´s say 1 USDC as an example, and then attempted to perform a swap using this 1 USDC flashloan amount to WETH on the same uniswap_router within the same transaction which I was told it is possible to do on the same router without the LOCKED error occuring.

Here´s the following code snippet which illustrates a simple contract which attempts to exchange USDC -> WETH (and erc20 token)

`
address[] memory path = new address;
path[0] = usdc; ()
path[1] = weth; ()

uint[] memory amounts = IUniswapV2Router02(uniswap_router).swapExactTokensForTokens(1, path, address(this), now + 15);
return amounts[1];`

uniswap_router = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
USDC = 0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48

From that call I get UniswapV2: LOCKED which, after looking around, only appears in UniswapV2Pair.sol (https://github.com/Uniswap/v2-core/blob/master/contracts/UniswapV2Pair.sol)

What did I do wrong here?

[Salah-SH]

did you solve the issue?